DEV Community: pmgzo

Branchless programming

pmgzo — Tue, 19 Mar 2024 10:14:54 +0000

Hi folks, I hope you're doing well.
Today I wanted to talk about Branchless programming.
Basically at a binary level, the compiler builds branches according to instructions.

What creates those branches are the if, else, else if statements. Otherwise any conditional instructions that create those branches.

A simple example (of C code) of that is:

int x = 5;

if (x > 10) {
  // do stuff
}
else {
  // do something else
}

Basically in this example your processor will put the instruction set in their cache memory when arriving to this instruction.

If the condition is not valid, it will unload the instructions within the if block and load those in else block

Which cost time computation because of the load and unload process.

Maybe, the compiler/processor have changed but at least this is what I learned about Branchless programming

Branchless programming is a way to code your program to avoid branches. Basically it's a way to trick the compiler to avoid additional instruction. Basically it is said that's better to do ternary return statement instead of the previous approach:

int your_condition(int x) {

  return x > 10 ? call_function1(x) : call_function2(x);
}

Thanks for reading, and see you in the next one 👊

Saving session token in web app

pmgzo — Mon, 18 Mar 2024 10:17:21 +0000

Hi everyone in this new post I wanted to share you how to save the identification token in your frontend app.

First I suggest to read this papper which state lots of vulnerabilties on web apps: https://owasp.org/www-project-developer-guide/draft/

I couldn't find the PDF but basically if you go to their github by typing "OWASP" you will definitely find it.

Anyway in this paper they state that we should store the session token in the localStorage. Because, if you want to go to another website, this website could have access to this session token which is a strong vulnerability.

So how do you do differently ?

They propose to store the session token in the sessionStorage window's property

That's it for today I hope you enjoyed this sharing

I see you in the next one 👊

web #frontend #websecurity

My first open source contribution for MongoDB

pmgzo — Sat, 16 Mar 2024 20:19:25 +0000

Hi everyone,

It's been a while that I wanted to talk about that.

3 years ago, I contributed to an open source project:
https://github.com/mongodb/mongo-c-driver

I decided to contribute, to earn knowledge and feel relevant as a young developer.

My contribution was literaly adding a line to fix a current bug that they had.

I took really my time to understand how the repository was built and I got facinated by the bson object.

To know more about that data structure here is link:
https://bsonspec.org/spec.html

"Bson" means "binary json". Basically keys and values of the bson are structured in a way to earn space and memory. They use this as a way to communicate with the MongoDB database and to process data faster.

I hope you learned something today and I see you in the next one.

mongodb

datastructure

client

bson

My last git command that I learned to use

pmgzo — Sat, 16 Mar 2024 20:07:37 +0000

My last command that i learn is git cherry pick <hash of the commit to use>

Basically "cherry pick" help you to add a commit from another branch to your current branch.

Say you coded a piece of code that you need right now in your current branch, you can use git cherry pick.

Just make sure that both branches (one with commit to add and your current branch) have a common root history. However they don't need to have exactly the same history.

New app for Developers looking for jobs is coming

pmgzo — Tue, 12 Mar 2024 09:32:14 +0000

Hi everyone, you might not know me much on this platform but I'm quite active on medium, youtube and linkedin.

I'm happy to share you that I will revolutionize the way to hire new developers in the tech industry. Believe me or not but it is coming.

So I give you the chance to not miss that occasion.

If you are interrested about this new app.

Please react on this post I will soon share an email address to reach me so that I can add you as fresh beta testers.

I wish you the best.

Sincerely,